Ribeiro, Douglas G., Celso S. Kurashima, Adilson E. Guelfi, and Marcelo K. Zuffo.
" Evaluation of theora and speex performance in IP videoconferencing." <em>Proceedings of the 18th Brazilian Symposium on Multimedia and the Web,
São Paulo, 2012</em>. SBC, 2012,  
pp.135-138.